Polishing-machine.



J.. C. BLEVNBY.

POLISHING MACHINE. APPLGATION FILED 2213.15.1912.

MJ/A nws ma w N R a. m Nrw M u... .2

J.C.BLEVNBY. POLISHING MACHINE.

APPLIGATXON PLBD rEB.15,191z

1,052,455. Patented F@b.11,1913

7 SHEETSSHEET 2.

ATTORNEYS J. C. BLEVNEY. POLISHING MACHINE. APPLIGAMON FILED H1115. 1912.

Patented Feb. 11, 1913.

7 SHEETSwSHEBT 3.

rft 11 INVENTOR BLW/v5);

WITNESSES:

J. G. BLEVNEY.

POLISHING MACHINE.

KPPLICATIGN FILED FEB.15, 1912.

1,052,455.v Patented Feb.11,1913.

7 SHEETSSHEET 4.

J.C.BLEVNEY. POLISH'ING MACHINE.

APPLICATION FILED PEB.15,1912. 1,052,455, Patented Fab. 11,1913.

7 SHEBTS-SHEET 5` INVENTOR BY n A gua/:fg I @J mj J. C. BLBVNEY.

POLISHING MACHNE.

APPLICATION PILEDPBB.15.1912, 1,052,455, Patented Feb. 11, 1913.

7 SHEETS-SHEET 6.

iNVENTOR MTURNEYS narran sfrafrEs PATENT iorareE.'.

JoH'N o. BLEVNEY, 0E NEWARK, NEW JERSEY.

PoLrsnrNG-'MAGHINE-i.

To'afll whom it may concern:

Be it known that I, JOHN C. BnEvNEY, a citizen of the United States, residing at Newark, in the,4 county of Essex and State of New Jersey, havel invented certain new and 'useful Improvements in Polishing Machines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use .the same, reference being had to the accompanying drawings, and to characters of reference marked thereon, which form a `part of this specification. Y

The present invention has reference, generally, to improvements in polishing machinery, and the'pr'esent invention has for its principal object to provide a compa-ct, efficient and `automatic polishing machine adapted, more particularly,vto impart a high bright polish to objects'having substantially round or cylindrical surfaces, and to therelby provide such objects with a smooth, uniform-.and highly nishedsurface, free from blemishes, burns, or buckles,or blistered appearance. 'l l The various specilic'objects of the present invention not at this time more particularly enumerated will be clearly understood fromv the following detailed description of this inyention. f c W ith the various objects of the present invention -in view, the said invention consists,

primarily, in the novel automatic polishing machine hereinafter set forth.; and, the invention consists, furthermore, in the novel arrangements and combinations of the several devices and parts, as well as in the details of the construction of the same, all of which w-ill be more fully described in detail in the following specication, v and then finally embodied in the clauses of the claim which are appended to and which form an essential part of t-he said specification.

The invention is clearly illustrated in the accompanying drawings, in 'which Figure 1 isafront elevation of a polishing machine showing one embodiment of the principles of the present invention; Fig. 2

is a transverse cross-section of the same,I

taken on line 2 2 in said Fig. 1, looking in the direction of the arrow` a.; Fig. 3 is a detail vertical'longitudinal section, drawn on an enlarged scale, and taken on line 3 3 in 'said Fig. 2, looking in the direction oi the arrow '6,- Fig. 4 is another detail ver- 'tio'al longitudinalsection, also drawn on an Specification of 'Letters Patent.

PatentedpFeb, 11,

enlarged scale, and taken on line {l-A in said Fig. 2, looking in the direction of the' arrow 0,' Fig. 5 is a detail. transverse section -illus trating the reversing mechanism .of the travelin carriage supporting Ithe polishing" or bu ng wheels; Fig. 5 is a detail longitudinal section of means for operating the said reversing mechanism of said traveling carriage; Fig. 6 is a detail transverse crosssection, drawn on an enlarged scale; and' taken on line 6-6 in Fig. 1, looking in the 'direction of the arrow d, said lview illus-V trites the driving mechanisrnjforrotating the objects-lobe polished; Figs. 7 and 8 are respective vertical longitudinal sections, drawn on an enlarged scale, of the chuck spindles for supporting the objects to -be polished; Fig. 9 isa vert-ical longitudinal section of the -driving mechanism Located ,at the left end of' the machine, and 10 is a similar view of the driving mechanism locatedat the right end of the machine,lbotl of said views being draWn"on anfenlarged`v scale; Fig. 11 is a vertical section ofmeans for adjusting and cont-rollin the work-car! rying mechanism with relatlo'nto said polishing or bufling wheels, thel same lbeing drawn on an enlarged scale, and taken on line 1l-11 in said Fig. 1; Fig. 12 is -a horizontal cross-section of said means for adjusting and controlling the work carrying mechanism with relation jto said polishing or buling Wheels, the'same being drawn on -an enlarged scale,'and taken on line 12-12 in said Fig. 11;,Fig. 13 is another vertical section of the same, taken on line 13-13 in said l; and Fig. 14 is a detail view Aillustrating a latch mechanism` connected with said means for adjusting and con- "trolling said work. carrying mechanism.

Similar characters of reference are em'- ployed 1n all of the said above descrlbed views, to indicate corresponding parts.

Referring nowto the'said drawings, the reference-charactersl 1 vand 1 indicate the respective end frames or standards of the machine, the same being joined together in proper relation to each other by a plurality of suitably disposed longitudinally extending struts or girdersQ. The endframes or standards 1 andl are provided with bearing-portions in the' form of bearing ribs 3 and 3" respectively. Journaled upc-n said bearing-ribs are journal-blocks 4 and 4", each of which is provided with an annular. groove 5 and 5 adapted to en- Y gage, respectively, said bearing ribs 3 and 3'. I

The said journal blocks are respectively provided with anges 6 and 6, to which are secured the respective end-plates 7 and 7 of a revoluble frame member. Said revoluble frame-member comprises said endplates'7 and 7 and the interconnecting longitudinally extending rods or struts 8. Connected with each of said rods or struts 8 of said revoluble frame-member are pairs of oppositely extending screw-threaded arms 9. Supported in connection with said screwthreaded arms 9 are the means for adjusting and controlling the work carrying mech.- anlsms. Said Work carrying mechanisms and their respective adjusting and controlling means each comprises a longitudinally extendin* supporting plate 10 provided, prefera ly, with flanged marginal edges 11.- Connected with each supporting plate 10 are a pair of rearwardly extending supporting arms 12, each provided with suitably disposed teeth providing a rack 13. The said supporting arms 1% are each slidably supported in a guide-portion 14 forme. incasings l5 which are movably related to the said screw-threaded arms 9, in such a manner that each of said supporting lates 10 is arranged Aso as to extend longitudinally. Journaled in bearings 16 formed upon said casings 15 are the respective ends of a longitudinally extending shaft 17, provided with pinions 18 which y mesh operatively with the racks 13 of said notch 22.

supporting arms 12, such arrangement insuring the uniform and simultaneous move-V ment of said supporting arms 12 in carrying forward or withdrawing said supporting plate 10. Connected with the end of each guide-portion 14 of said casings 15 is a latch-mechanism which serves to locksaid supporting arms 12, and said supporting plate 1() connected therewith, in their forwardly moved position. Said latch-mechaf nism comprises a yoke-piece 19, arranged to move laterally of said guide-portion 14, and provided u` on one side with a stop-pin 2O which slides in an opening 21 in said guide-portion 14, so as to engage in holding relation therewith a groove or notch 22 formed in said supporting-arm 12 adjacent to its inner end. Arranged between the op- 'i posite side of said yoke-piece and said guide-portion, and seated upon retainingpins 23 fixed upon said respective parts, is a spring-member 24 for actuating said latchmechanism to cause the proper engagement of said stop-pin 20, with said groove or The means roviding for the vertical adjustment of said supporting plates 10 comprises internally screw-threaded nutpieces 25, which engage or ride upon the respective screw-threaded arms 9. Said nutpieces 25 each ride within one of said casings 15, so as to' cause the upward or downward movement of the latter, whereby said supporting arms 12, and the respective supporting plates 10 connected therewith arecarried up or down in accordance with the desired vertical adjustment. In order to assure the uniform and simultaneous movement of the respective casings 15 from which extend, in the manner above described, the respective supporting arms 12 carrying the supporting plate 10 there is provided a longitudinally extending shaft 26, the opposite ends of which are connected rwith worm-members 27 j ournaled in bearing portions 28 of the respective longitudinally opposite casings 15. Each nut-piece 25 -1s provided upon its circumferential surface with worm gear teeth 29 which mesh with the respective worm-members 27 Each longitudinal shaft 26 thus arranged is provided with a suitably located hand-wheel 30, which serves to turn said lshaft 26, thereby operatingsaid worm-members 27 to simultaneously turn said nut-pieces 25 of longitudinally opposite casings 15, and whereby the latter are moved upwardly or downwardly upon said screw-threaded arms 9 to which they are connected, thus causing said uniform upward or downward vertical adjustment of the said supporting plate 10 connected therewith.

Each of said supporting-plates 1,0 is adapted to carry`a means for holding and rotating the work to be polished, such for example as tubes 31. This mechanism comprises an adjustable spindle device and a driving or rotating spindle device. .The said driving or rotating spindle device oomimpart the rotation of said spindle 34 thereto. Of course, it willbe understood that said chuck-members 36 may be made in any desirable form 0r style, as may seem'best adapted to the work to be handled, and said chuck-member 36 ma be connected with said spindle 34, so thatv its rotation may be stopped 4independently of the spindle 34 it desired. The said adjustable spindle device comprises@I bearing member 37 supported upona basg-plate 38, `adapted to be received upon said supporting-plate 10 between the marginal flanges thereof. Said bearing member .37 is retained in any desired adjusted positionv upon said supporting plate l0 by means of a clamp-piece 39, whlch en- Vprises a bearing-member 32,supported upon A` said slew-e,

.secured u. am? 'ingiuria gages, in binding relzxtirhy liv-h fi plate 38 and Said sup'mrmgimm 'HEI .clamppicce is provided with a clamp-sere 40Mfm' tightening or binding mii! damp pige in its holding pui-t' wel. mehs said adjustable Spindle levi iw i shifted lougifuflinzilly Nimm wml ing-plute l0, and secured in will im l." l position as will zicemhmmime :iw ie-laimi fu" l i. the driving 0r retaining spindle dence zum i ,eg/n f: i by one 01 75 the adjustable spindle devies in ihe leiiiylli auf V`ch lmveli z i Y of tube to be worked upon. hhdwflv .lz r 2 wim-hai pm or site end of said tube Hilf. ,wi lime i I i mnh Tu will Provided with sm iiwerf-wl 'l w f= ..i im: :iirfeix to be engaged by sind ein l im M' Said heldingiiiemw li reduced shank wiwi und Freien-fs hewn bearingy ifi ing emi wi 091ml' if l h" bearing mvmhw.

ment nl' s. i?, 51H1 achmiell by :i @prune ,imi L f engagement ik I place 1n eenmvmm di" said rugpeeiiw Aprile ,l

same awww? U,- mg,

Qr Chuck 4;', mi hy against. the tei m n 46, the oplmile ein?,

rgitered with Suid l i :lim Sid n tzflting Spindle de. f 1 the engugeiiit .l' the ff:

ward presu're is; iu'

member 4G mmm-'a sum L f ter point or clinch, ih operative puffi* ifm The means; 11u' ing ei' rotating# Ru' following meen block l is; pim i extending mingling 3T :n :1 Sleeve 4S. #www 115m;

'liv' ia meshes with :i j A upon :1 slml-slw sleeve 4?, Said sxleeve p" said end-p1me T of said r member, and secured to this xgfmwl il mwah @nifl Meme G7,

:mil hv umili ei ured to said end-platel 7 is a pnitm effin fiorire-fl. Jiiisw in Said l i v M i casing 55, Providing beaxzing iimlzmw h1 u; `1 .l5 and 1l: :1re the 0ppmwluch are journaled the gmu'xm meer m :iiU l jjmimi ends 7,1% und T9 if i 11 plurality of radially dipana@ ml lon',

minimally @ii-nhg smare to said revoluble frame.

driving shaft 80, said respective journal ends 79 and 79 project beyond the outer ends of said respective sleeves 48 and 67, and are provided v1with pulley-Wheels 8l and 81', over which run the respective driving belts 82 and 82 byymeans of which said square driving shaft 80 is driven from the source of power. Mounted Within said revolving frame is a polishin or butiing wheel carrier comprising, a main casting 83, preferably parted for easy assembling, to which is secured, at one end, radiating arms 84. The said radiating arms 84 are each provided with biturcated bearing blocks each bearing block 85 being adapted to support a air of inclined traction-rollers 80, which ride upon one of the respective 1ongitudinally extending rods or struts 8 of said revoluhle frame, whereby said polishing or butiing Wheel carrier is always maintained in a longitudinally movable relation Said main casting 83 is provided with a central longitudinal openin 87, in which is journaled a rotatable s eeve 88, provided with a centrally disposed squared opening 89, through which extends said square driving-shaft 80, in such a manner. that While said sleeve 88 tree to slide longitudinally upon said square driving-shaft it nevertheless receives its rotary movement from the same, Arranged within said main casting S3, and secured upon said sleeve so as to rotate therewith, is a spiral gear 90. Connected with main casting 83 are a plurality of outwardly extending and angularly disposed' bearing-arms 01, in which are journaled polishing or boiling Wheel mandrels 92,

. upon the outer free ends of which are secured, between the stationary hub-plate 053 and the removable hub-plate 94, the polish-- ing or butling Wheels 05. Secured upon each mandrel 052 is a spiral gear 96, inclosed in a suitable gear casing 97 formed upon said casting S8. llach of the said spiralgears 00 meshes cjnlratively with said spiral gear 00 secured upon said sleeve 88, thus the rotation et said square driving-shaft is imparted to said polishing or butting ivheel mandrcls, and the polishing or butiing wheels connected therewith, by said sleeve 88 and the intermeshing spiral gears 90 and 00. Formed in connection with said maincasting -i, znljacent to the ends there- Y of. are outwardly projecting arms 0n and each provided. in their free ends with openings 90 and 00' respectively, thrcugh which extend said respective right and lett feed-screw shafts 73 and 74. llxtciending outwardly `from said main casting dfi are other arms 100, arranged at right angles to i said arms 9S and 98', the same being provided with openings 101 in which is slidably support-ed a carrying sleeve 1.02. Secured upon said carrying-Steeve in a proper i t i i j l l l 'frame location, both with reference to their position on said sleeve and their relation to each other` are a right shifting cam 1031 and a left shitting cam 103. Extending through said sleeve 102 is a rod 104, the same extending longitudinally of said revoluble frameJ and the ends being properly supported 1n bearing-members, such for example as the hearing member 105. Said rod 104 may be screw-threaded, as shown, to permit of any desired adjustment, as to location, of stop-members 100 and 106 carried thereby. The openings 107 at each end of the carrying sleeve 102 are 'enlarged for the reception of the respective coil springs 108, which are seated in engagement with the ends or bottom of said openings 107. Each end of said carrying sleeve 102 is provided in its outer surface with a notch or grooved portion 109, the same being adapted to be engaged at proper times by spring-actuated latch-pieces 110, which are pivot/ally connected with some suitable portion of said main casting 83. lach latchpiece 110 is provided With a forwardly extending cam end-portion 111, which pro jects beyond the ends ot said carrying sleeve 102. The said casting 83 is further provided. with other arms 112, extending out-- vvardly therefrom and at right angles to said arms 98 and 98, and oppositely of said arms 100, the same supporting a rod.113 upon which is, ivotally connected a yoke- 114. gaid yoke-frame extends around said casting 83, and is provided upon the side opposite to its pivot with a pair of lugs or projections, 115 and 115 respectively, which straddle said carrying sleeve 102, and which lie in the path of said left and right shifting cams 103 and 103. Connected with opposite sides of said yoketrame 114 are the respective threaded shoes 116 and 116, which are alternately caused to engage the resj'icctivc right and lett feedscrew shafts '7f3 and '74 whereby the latter A are caused to impart to said polishing or buiiting wheel carrier a longitudinal traveling movement, within said revoluble trame, in alternate directions, and whereby the rotating j'uolishing or builing vvh eels are caused to travel back and forth over the work to be polished, when the latter is placed in contact therewith, all of which will be subsequently more fully described. The said revoluhle trame is adapted to be rotated, supported b v its journal blocks 4 and 4t', by hand, to bring` the various work holding elements to the hand of the operator, so that the finished work may be removed and. new Work inserted continuously Without interruption, during the operation of the machine. In thus revolving said revoluble frame, it will be apparent that ordinarily it is desirable to revolve the same in one given direction.v To prevent the operation of said revolving by U19 10o Suid SDIMHG dvx @um :Hifi nu' A u 105 ncctcd Lhcrewh. ww :ii-s pfff..

the rsvipx'ocnfllf; und lmdlifly Mmm@ lmfing whvelS @In wieft Shoe surface of the minimi 1 Mx Suid carry :nid pulihhmg m' W li'ng v ahve 110 into operative (roulant, with mi if A, food is carried ffii/ii the hand of th@ operator again, tlieismne is l :iwi may he" rianimfozl, f

coinpleioj: ilo and another unwind. ll'iion tubes o1' :iliii'oi'eni miam@ am io be polislioil, the work holding; lm/*oss muy ne easily uismil or loioi'cd in nisi'fviinniodzito ih@ iiihe to :i piopr confusi; Willi the poliiehing or builing' wheels, :y iiining iiho lmnfii\lieel 80 Lo adjust the moan, mirrying said wipiwring plates 1,0, upon the Screw-ihieiuld arms f), all. in a. manner clearly to he nmilerstooll from an inn-pection of Lina, ilrzixvinipa, ind in the Sinne nmoiwr adjustment may he oli minod lo Loinpffn. im ile@ wem' of onliiig of polishing wlicolb. li will zilSo he Clearly evident that hy this means fx, very delicato adjustment oi ih@ pressure of the poliSh ing Whoelri upon (no voili, may he also ohmined7 thru :ilihough ilio polishiiik/ oi: the', in oilmiml in, iin :iiioimiif imnnu, yet noi-o nmluo. and imingn mi can he ojiinineii in lhi` inihhm' :fui'impo can ho oliiuii'ioci @van by iirind poiis since :ill flmig'oi or, unevon pre: Vimod, and huma` blietei's :ind avoided.

AS many clizingos may be made in the nho'vo desu-ihm oom'tiiicl'ion of my inrfention ind itis detail parts, `find many appar ently widely dirl'mniv Qnilsoilimenis of my invention mild Je umile without departing frol'n the no ihoreof I inend ihm; :lll mattei' (foniiiincfil in 'the above ilerSf/iipiioii or Shown in ilnaccompanying drzwvinig's simil he. iz'iioiy'vii'iiui :is illntmive :in/invii in li limiting gonfio. l (lenire ii algo lo ho iiii\lei:-;t ,ofl thm; the @language 115ml in ih@ following vlaiiim intiiilo'ii to cover :ii

l l. uli ng, ure ib: ol,-4 hleni heb l: Olon'wm warm fl wohin smul 'iii-:mic :imposa: ,nul moin# y 3. ln n olevico of tho Llega-i 1 revnluhle finirla-meid l Carried ny mill conneciod wiih d vor for i'otniing the vinili. i within 'sziifl I'Qvoiuoi means foi: reoipi'ocailii nient longitudinally.

In a device of ihm claas iinbciihed. :i I'ei'ollihle, frame-nicmhei". work holding o? vices, means for ad'iuituhly snppii'ing Saul work holding devi( in connection w'ii Said i'evolnhle fi'ziiiiwiiionelwr'. means con-- nec'teil with said mlz-lioliling deines foi" rotating the work, r1 poii ing Moment with-- in said i'evolulole 'immsnm-inbox, ind nimm for reciprocating .smid imlifxhing izlmnsnf: lon giiudiniilly.

5. ln a device of hiclimi do -i-iheeh ii. reinluble frfinie'fwmls, vfwdlox il. Ionnmtofl with siii'ifl i" im] on3ipmting-plsiiesn n: Saifl ",i :w-ihrea fied i i h Carrying" said suppoiiizgxir vos, :i ioiiiahirf work holding spindle dairies :nui an adj-it able Ork holding` spindle device conneteil wiih said supportingpplzito, i1, power trans-n mission mechanism 'foi' iomiing mici rotatable work holding.; Spinzliff. devices. n polislhing vlonien. and nis-uns in! moiyizocfiiing Said polishing olvnieni iGiigiiiii'linzilly.

6. In n device of tho, @hv-S ciofsi'hofl, Siu im'oluhle franii --i\01l i isemlt-ji imm Qonnmfiod with said riigooxwrina loifgiiz/.linal siiippftfrtiliggpliilesh iz uw frtmlivof'd with mid scifeiv-threailwl diffus for mijcisifiihlj: @a1-Wing said suppoi't'ingizliito: vitamin@ wol-lf. holding' Spinillo "i-:iire :1r i .m adjust nifl@ Yurk holding: Siwilf i'isiiime comioiul with fni i suppo1'iimf-`` 1 mission mvolmni; w i" fo? v'olv work-holding ,spindle i dinzilly und Cvntmily il :sli: ft n polishing wlw l of polinling wheels, ni sfiifl. po hing whifl wir i anni driving-Bindi for i fziii i ing .i'iivols, and nimm mi polishing wheol: mii-iin* lo' in u device (ai lli rv'if'oliiha from@ n: moans cai'iieil izy simi fr i gitudiniilii nml Contro-, r shaft, n polishing-r 'Mim of polhailingwhviss www for Neid polishingw'ineol "ssiri i :iwi o; Said driving* sziinlf, foi1 'A i in# nhvols. funi inem nl poi ning whwl. In (loin-o of #f1 pail' of :g 'le-fi'nn'm. hoi-q mmpi'i'sing mi imi-imminenting' loi ,'iiil-l'iloiflfzs. provided ingo connected vill? mois; i, ff infinis holding oievioes polishing elvnient Hamon inbox; :m6 L, will piilishlng ai@ im conn.5

7m iniziojouniai ed in I farmi' :w

am Lidjiibiii coiinemm'i Lieve rot am su gas thu ",zifs fiegci'ibminl n me?, n pluially of 110 i mmm: im vomiting sind holding 'ipinflis ziiltuimitivzilly said rmpuciivc i ,i wheel vari-10i, gitiidinziily unil z A f l i. ,r 'vz mi' presenting hv smid :ir-Mix; z i u i .,i-V :said polishing ihiiipj A i ,ii 55 mid am," zii@ vins, (ie'esciiiwd, n 120 1li;if', a pair (if feedviiiwl Carrier slidivmg shaft und Anid :i Nm'nliy uf polishing mmm fipeinfwi by -nid driving 125 ffii' winiif; fifi pulisiiiii; WheviS.

vin contact with said rotating and longi movement of said polishingnvheel carrier,l and means for presenting the work to be polished in Contact with said rotating and l reciprocated polishing-Wheels:

14. ln a device of the class described, a i longitiulinal driving shaft a pair of feedscrew shafts, a polishiilg Wheel carrier Slidably related to said driving shaft and said feed-screw shafts, a plurality of polishing Wheels, means operated by said driving shaft for rotating said polishing Wheels, a longitudinally extending rod, stop-rnembers adjustably mounted on said rod, a carrying sleeve slidably related to seid polishingwheel carrier, lett and right shifting cams carried by said carrying sleeve, a yoke-Y trame pivotally connected with said polishing-Wheel carrier, projections on said yokeframe adapted to be engaged by said shiftingr cams. threaded shoes connected with said yokerame for alternately engaging' said respective feed-screw shafts, coil springs engaging' each end of. said carrying sleeve and adapted to be compressed by en'h gagement with said stop-members, latchmechanisms engaging each end of said carrying sleeve to retain the same a ainst movement during the compression o? said coil-springs but adapted to be released by engagement with said stopmen1bers when saidcoil-springs are compressed, and means for presenting the work to be polished in Contact with said rotating and reciproeated polishing-Wheels.

15. In a device of the class described, the combination With a revolnble frame-Work of a polishing Wheel carrier, a plurality of polishing wheels, means forrotating said polishing wheels, means for automatically reciprocating said polishing wheel carrier longitudinally Within said framework, and adjustable means carried by said framework for presenting the work to be polished tudinally reciprocated polishing wheels.

16. In a device of the class described, a work supporting means comprising screw threaded arms, a nut-piece on each arm, a casing surrounding each nut-piece, guideportiuns connected with each easing, supporting arms slidably mounted in said guide-portions, a supporting plate connected with :i pair ot' said supporting arms so as to longitudinally straddle a pair of said if screw-threaded arms, means for intercon-4 necting` the supportiilg arms ot.said sup porting plate to insure the simultaneouszi movement ot the same. means `For operating the nut-pieces of each screw-threaded arm i to sinmlaneously raise or lower said cas i, upon said screw-threaded arms, andi means carried by said supporting piatc for i holding the Worn' to be polished. s

17. In a device of the class described, a work supporting means conn ising screwthreaded arms, a nut-piece en earth arni pro vided with external worinf-geanteeth, a cas ing surrounding each nutqiicce, guide-por tions connected with each casing, supporting-arn'ls slidably mounted in said guide portions, a supporting-plate connected with a pair of said supportingarnis so as to longitudinally straddle a pair of said screw-threaded arms, spring-actuated latchniembers adapted to engage said supportw ing-arms to retain the saine in their tor-- Wardly moved positions, means for interconnecting the supportingarms of said sup-- porting-plate to insure sinnilltaneous move- Ament of the saine comprising, a rack connected With each supporting-arm, pinion engaging each rack, and a longitudinal connecting shaft upon which said pinions are mounted, means for operating said nut pieces et each screwthreaded arm to siniultaneously raise or lower said casings upon said screw-threaded arms comprising a worm-member journaled in each casing and engaging the worm gear-teeth of said nutpieces, a longitudinal connecting sha-ft connecting said Worm-members, and a hand Wheel on said shaft, and means carried by said supporting'plate for holding the Work to be polished.

1S. 1n a device of the class described, a polishing element, a rotary polishing Wheel, and a plurality of adjustable Work holding means adapted to present the Work in .contact with different points of the polishing wheel surface.

19. In a device of the class described, a polishing element, a plurality of rotary polishing wheels connected therewith, and a plurality of adjustable Work holding means adapted to present the ivorl; 'in contact 1with different points of each polishing wheel surface.

E20. In a device of the class described, a

polishing/ element, a driving shaft, a plurality of rotary polishing Wheels connected with said polishing element, polishing wheels being mounted planes angulirly disposed with relation to the afgis ot said driving shaft, intermediate transin'ssien mechanism between said driving shaft and said polishing wheels, and woricimlding means adapted to present the work in ccntact with said polishing wheels.

ln testimony. that I claim the invent/ien set .forth above .l are hereunto set my hand this` 13th day oi liebrnanv. lutz).

JOLI-lli.' ill. LEJNEY.

Witnesses:

GEORGE l). Rnnmnns, Fellini. H. li". lf`ninn'rmin. 

